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From: Tim Chase <python.list@tim.thechases.com>
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Subject: Re: Irregular last line in a text file, was Re: Regular expressions
Date: Tue, 3 Nov 2015 10:56:53 -0600
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On 2015-11-03 16:35, Peter Otten wrote:
> I wish there were a way to prohibit such files. Maybe a special
> value
> 
> with open(..., newline="normalize") f: 
>     assert all(line.endswith("\n") for line in f)
> 
> to ensure that all lines end with "\n"?

Or even more valuable to me:

  with open(..., newline="strip") as f:
    assert all(not line.endswith(("\n", "\r")) for line in f)

because I have countless loops that look something like

  with open(...) as f:
    for line in f:
      line = line.rstrip('\r\n')
      process(line)

-tkc